The Important Role of Rotary Kiln
Date：2017-12-01 Source：zk corp Views:
In the rotary kiln applications, the largest number of is cement industry. The whole production process of cement is summarized as "two grinding and one burning", among which "one burning" means the process of burning raw materials after grinding and grinding into clinker under the high temperature of the rotary kiln. Therefore, the rotary kiln is the host of cement production, commonly known as cement factory "heart." In the building material industry, the rotary kiln is used for calcining the clay, limestone and slag for drying in addition to calcining cement clinker. In the production of refractory materials, the rotary kiln is used to burn raw materials to make them stable in size and increase in strength. Processing molding. In ferrous and non-ferrous metallurgy, metal such as iron, aluminum, copper, zinc, tin, nickel, tungsten, chromium and file is sintered and rotary kiln for smelting equipment to sinter and roast ore, concentrate and intermediate.
Such as: aluminum production it is used to roasting aluminum hydroxide into alumina; use it in iron making pellets for blast furnace iron making; foreign "SL / RN Law", "Krupp Law" use it on iron ore direct reduction; chlorinated volatile roasting method using it to extract tin and lead. Beneficiation process, the rotary kiln with poor iron ore magnetization roasting, so that the original weak magnetic ore changed to strong magnetic, in favor of magnetic separation. Chemical industry, the production of soda with a rotary kiln, calcined phosphate, barium sulfide. 60s of last century, the United States LapPle invented the usage of rotary kiln phosphate production of new technology. The method has the advantages of low energy consumption, low electricity consumption, no sulfuric acid and availability of medium and low grade phosphate rock, and is rapidly being promoted.
In terms of environmental protection, the developed countries in the world use cement kilns to burn hazardous wastes and garbage for more than 20 years. This not only reduces and decontaminates wastes but also uses the wastes as fuel to save coal and waste recycling.